NATIONAL BOARD DENTAL HYGIENE
EXAMINATION COMPREHENSIVE STUDY GUIDE
2026 VERIFIED ANSWERS
◉ foramen rotundum of sphenoid bone Answer: maxillary division
of trigeminal nerve division of the trigeminal nerve runs through
here
◉ foramen ovale of sphenoid bone Answer: mandibular branch
division of the trigeminal nerve run through here
◉ what muscles of the tongue protrudes it outwards Answer:
genioglossus
◉ how many cranial nerves are there? Answer: 12
"Oh, Oh, Oh, To, Touch, And, Feel, Very, Good, Velvet"
"Some Say Marry Money But My Brother Says Big Boobs Matter
More"
◉ What is cranial nerve V? Answer: trigeminal nerve
◉ What is cranial nerve VII? Answer: facial nerve, it supplies the
facial muscles, taste to anterior 2/3 of tongue, and the
,parasympathetic intervention of the submandibular and sublingual
salivary glands
◉ What is cranial nerve IX Answer: Glossopharyngeal; responsible
for senses, taste of the posterior 1/3 of tongue and parasympathetic
innervation of the parotid gland
◉ what is cranial nerve XII? Answer: Hypoglossal; controls most of
the tongue movements, important for speech and swallowing. It
does not include the palatoglossal muscle
◉ PSA block anesthetizes: Answer: Maxillary molars EXCEPT the MB
root of the first molar and facial gingival tissue
◉ MSA block will provide anesthesia to what areas? Answer: Max
Premolars and the MB root of Mx 1st molar, AND the facial gingival
tissue
◉ ASA block will provide anesthesia to what areas? Answer: Max
anterior teeth and facial gingival tissue
◉ IA block will provide anesthesia to what areas? Answer: All areas
of the manible except the buccals of the 1st, 2nd and 3rd molars
,◉ Mental block will provide anesthesia to what areas? Answer: first
mandibular premolar to midline. No teeth are anesthetized!! Soft
tissue only
◉ Buccal block will provide anesthesia to what areas? Answer:
Buccal gingival tissue of molars
◉ What branch of the trigeminal nerve innervates the muscles of
mastication? Answer: V3: the mandibular branch of the trigeminal
nerve
◉ What muscles open the mouth? Answer: lateral pterygoid, and
hyoid muscles
◉ What are the muscles of mastication? Answer: temporalis,
masseter, lateral pterygoid, medial pterygoid
◉ Trismis Answer: condition that causes reduced mobility of the jaw
◉ Crepitus Answer: a crackling or grating sound usually of bones, it
indicated pathology
◉ What are the muscles that are responsible for smiling? Answer:
Zygomaticus, Risorius, Levator anguli oris
, ◉ Arteries Answer: Blood vessels that carry blood away from the
heart
◉ Veins Answer: Blood vessels that carry blood back to the heart
◉ mitral valve prolapse Answer: Improper closure of the valve
between the heart's upper and lower left chambers. Causes a
backflow of blood into the aorta. These pts NO LONGER need
premedication
◉ pterygoid plexus Answer: A network of veins corresponding to the
second and third parts of the maxillary artery. It drains the teeth,
muscles of mastication, buccinator, nose and the palate
◉ Submental lymph node Answer: drains the mandibular incisors,
tip of the tongue, middle of the lips and the floor of the mouth
◉ submandibular lymph node Answer: drains most of periodontal
tissues and the submental node as well
◉ deep cervical lymph nodes Answer: drains the submandibular
node and walls of the throat
EXAMINATION COMPREHENSIVE STUDY GUIDE
2026 VERIFIED ANSWERS
◉ foramen rotundum of sphenoid bone Answer: maxillary division
of trigeminal nerve division of the trigeminal nerve runs through
here
◉ foramen ovale of sphenoid bone Answer: mandibular branch
division of the trigeminal nerve run through here
◉ what muscles of the tongue protrudes it outwards Answer:
genioglossus
◉ how many cranial nerves are there? Answer: 12
"Oh, Oh, Oh, To, Touch, And, Feel, Very, Good, Velvet"
"Some Say Marry Money But My Brother Says Big Boobs Matter
More"
◉ What is cranial nerve V? Answer: trigeminal nerve
◉ What is cranial nerve VII? Answer: facial nerve, it supplies the
facial muscles, taste to anterior 2/3 of tongue, and the
,parasympathetic intervention of the submandibular and sublingual
salivary glands
◉ What is cranial nerve IX Answer: Glossopharyngeal; responsible
for senses, taste of the posterior 1/3 of tongue and parasympathetic
innervation of the parotid gland
◉ what is cranial nerve XII? Answer: Hypoglossal; controls most of
the tongue movements, important for speech and swallowing. It
does not include the palatoglossal muscle
◉ PSA block anesthetizes: Answer: Maxillary molars EXCEPT the MB
root of the first molar and facial gingival tissue
◉ MSA block will provide anesthesia to what areas? Answer: Max
Premolars and the MB root of Mx 1st molar, AND the facial gingival
tissue
◉ ASA block will provide anesthesia to what areas? Answer: Max
anterior teeth and facial gingival tissue
◉ IA block will provide anesthesia to what areas? Answer: All areas
of the manible except the buccals of the 1st, 2nd and 3rd molars
,◉ Mental block will provide anesthesia to what areas? Answer: first
mandibular premolar to midline. No teeth are anesthetized!! Soft
tissue only
◉ Buccal block will provide anesthesia to what areas? Answer:
Buccal gingival tissue of molars
◉ What branch of the trigeminal nerve innervates the muscles of
mastication? Answer: V3: the mandibular branch of the trigeminal
nerve
◉ What muscles open the mouth? Answer: lateral pterygoid, and
hyoid muscles
◉ What are the muscles of mastication? Answer: temporalis,
masseter, lateral pterygoid, medial pterygoid
◉ Trismis Answer: condition that causes reduced mobility of the jaw
◉ Crepitus Answer: a crackling or grating sound usually of bones, it
indicated pathology
◉ What are the muscles that are responsible for smiling? Answer:
Zygomaticus, Risorius, Levator anguli oris
, ◉ Arteries Answer: Blood vessels that carry blood away from the
heart
◉ Veins Answer: Blood vessels that carry blood back to the heart
◉ mitral valve prolapse Answer: Improper closure of the valve
between the heart's upper and lower left chambers. Causes a
backflow of blood into the aorta. These pts NO LONGER need
premedication
◉ pterygoid plexus Answer: A network of veins corresponding to the
second and third parts of the maxillary artery. It drains the teeth,
muscles of mastication, buccinator, nose and the palate
◉ Submental lymph node Answer: drains the mandibular incisors,
tip of the tongue, middle of the lips and the floor of the mouth
◉ submandibular lymph node Answer: drains most of periodontal
tissues and the submental node as well
◉ deep cervical lymph nodes Answer: drains the submandibular
node and walls of the throat
